Equity-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Weighted Average Assumptions

The fair values of the options and equity warrants granted in the six months ended June 30, 2014 and 2013, were estimated based on the following weighted average assumptions:

	Six Months Ended June 30,
	2014	2013
Risk-free interest rate	1.66%	0.14% - 1.01%
Expected dividend yield	—	—
Expected lives	5 years	1 year to 5 years
Expected volatility	92.631%	89.727% - 118.222%
Weighted average grant date fair value for options and equity warrants issued	$0.23 per option/warrant for 855,000 options/warrants	$0.12 per option/warrant for 2,520,000 options/warrants

Stock Option Activity

Stock option activity for employees:

	Number of Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value
Outstanding January 1, 2014	10,611,480		$	1.73	4.92	$	—
Granted	855,000		0.36		9.92	—
Forfeited	(200,000	)	0.43		8.00	—
Outstanding June 30, 2014	11,266,480		$	1.66	4.77	$	—
Vested and expected to vest June 30, 2014	11,266,480		$	1.66	4.77	$	—
Exercisable June 30, 2014	10,457,730		$	1.73	4.25	$	—

855,000 options to purchase shares were granted to employees during the six months ended June 30, 2014.

Unvested stock option activity for employees:

	Number of Options		Weighted Average Exercise  Price		Average  Remaining Contractual  Term  (Years)	Aggregate  Intrinsic Value
Outstanding January 1, 2014	525,000		$	0.29	8.38	$	—
Granted	855,000		0.36		9.92	—
Vested	(571,250	)	0.28		9.18	—
Forfeited	—		—		—	—
Outstanding June 30, 2014	808,750		$	0.37	9.11	$	—

Stock option activity for non-employees:

	Number of Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value
Outstanding January 1, 2014	4,128,432		$	1.48	5.01	$	—
Granted	—		—		—	—
Exercised	—		—		—	—
Forfeited	(200,000	)	2.97		3.56	—
Outstanding June 30, 2014	3,928,432		$	1.40	4.56	$	—
Vested and expected to vest June 30, 2014	3,928,432		$	1.40	4.56	$	—
Exercisable June 30, 2014	3,807,599		$	1.65	4.43	$	—

No options to purchase shares were granted to non-employees during the six months ended June 30, 2014.

Unvested stock option activity for non-employees during the year:

	Number of Options		Weighted Average Exercise  Price		Weighted  Average Remaining  Contractual Term  (Years)	Aggregate  Intrinsic Value
Outstanding January 1, 2014	470,833		$	0.25	9.61	$	—
Options granted	—		—		—	—
Options vested	(350,000	)	0.25		9.11	—
Options forfeited	—		—		—	—
Outstanding June 30, 2014	120,833		$	0.25	9.11	$	—